Kibirev, Vladimir Some cases of problems for harmonic functions with oblique derivative with polynomial coefficients. (Russian. English summary) Zbl 0637.31003 Differ. Uravn. Primen. 40, 41-46 (1987). The Poincaré problem to find harmonic functions symmetric with respect to the axis is considered, when the boundary conditions with polynomial coefficients are given. MSC: 31B05 Harmonic, subharmonic, superharmonic functions in higher dimensions 35J25 Boundary value problems for second-order elliptic equations Keywords:Poincaré problem; harmonic functions symmetric; boundary conditions with polynomial coefficients PDFBibTeX XMLCite \textit{V. Kibirev}, Differ. Uravn. Primen. 40, 41--46 (1987; Zbl 0637.31003)